Fix BigNumber::AsByteArray function by returning Auto_Ptr.

Remove mutex from BigNumber class - it didn't do what it was advertised to do - consider using the "locked" array outside of the function in which it was "locked".

src/server/game/Server/WorldSocket.cpp

@@ -730,11 +730,11 @@ int WorldSocket::HandleSendAuthSession()
 
     BigNumber seed1;
     seed1.SetRand(16 * 8);
-    packet.append(seed1.AsByteArray(16), 16);               // new encryption seeds
+    packet.append(seed1.AsByteArray(16).get(), 16);               // new encryption seeds
 
     BigNumber seed2;
     seed2.SetRand(16 * 8);
-    packet.append(seed2.AsByteArray(16), 16);               // new encryption seeds
+    packet.append(seed2.AsByteArray(16).get(), 16);               // new encryption seeds
     return SendPacket(packet);
 }